The atmosphere looks serene, fun and full of cheer as fans integrate...
Goal.com's Italian reporters are out and about in the streets of Rome as they follow the action.
Italy chief editor Sergio Stanco is getting up close and personal with both United and Azulgrana fans and he describes the scene live from Rome.
"I am in Piazza di Spagna and it's a Catalan show here. Everyone is in a Barcelona shirt and fans are using flutes to make noise as they chant along. They are singing anti-Real Madrid songs, and other club anthems.
"Among the Barcelona fans are supporters from Manchester who are dancing around with beers in their hands."
The weather in Rome is good and it has cooled down as Italian football writer Daniele Perticari keeps his eye on conditions in the capital.
"It's 28 degrees centigrade at lunch-time and temperatures are expected to cool down for tonight's big kick-off. The pitch in the Stadio Olimpico is looking in great condition," added Daniele.
Sergio Stanco, Daniele Perticari and Salvatore Landolina, Goal.com